opcodes/z80-dis.c

   1 /* Print Z80, Z180, EZ80 and R800 instructions
   2    Copyright (C) 2005-2020 Free Software Foundation, Inc.
   3    Contributed by Arnold Metselaar <arnold_m@operamail.com>
   4
   5    This file is part of the GNU opcodes library.
   6
   7    This library is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    It is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "disassemble.h"
  24 #include <stdio.h>
  25
  26 struct buffer
  27 {
  28   bfd_vma base;
  29   int n_fetch;
  30   int n_used;
  31   signed char data[6];
  32   long inss; /* instruction set bit mask, taken from bfd_mach */
  33   int nn_len; /* address length: 2 - Z80 mode, 3 - ADL mode*/
  34 } ;
  35
  36 typedef int (*func)(struct buffer *, disassemble_info *, const char *);
  37
  38 struct tab_elt
  39 {
  40   unsigned char val;
  41   unsigned char mask;
  42   func          fp;
  43   const char *  text;
  44   unsigned      inss; /* bit mask of supported bfd_mach_* or 0 for all mach */
  45 } ;
  46
  47 #define INSS_ALL 0
  48 #define INSS_Z80 ((1 << bfd_mach_z80) | (1 << bfd_mach_z80strict) | (1 << bfd_mach_z80full))
  49 #define INSS_R800 (1 << bfd_mach_r800)
  50 #define INSS_GBZ80 (1 << bfd_mach_gbz80)
  51 #define INSS_Z180 (1 << bfd_mach_z180)
  52 #define INSS_EZ80_Z80 (1 << bfd_mach_ez80_z80)
  53 #define INSS_EZ80_ADL (1 << bfd_mach_ez80_adl)
  54 #define INSS_EZ80 (INSS_EZ80_ADL | INSS_EZ80_Z80)
  55 #define INSS_Z80N (1 << bfd_mach_z80n)
  56
  57 #define TXTSIZ 24
  58 /* Names of 16-bit registers.  */
  59 static const char * rr_str[] = { "bc", "de", "hl", "sp" };
  60 /* Names of 8-bit registers.  */
  61 static const char * r_str[]  = { "b", "c", "d", "e", "h", "l", "(hl)", "a" };
  62 /* Texts for condition codes.  */
  63 static const char * cc_str[] = { "nz", "z", "nc", "c", "po", "pe", "p", "m" };
  64 /* Instruction names for 8-bit arithmetic, operand "a" is often implicit */
  65 static const char * arit_str[] =
  66 {
  67   "add a,", "adc a,", "sub ", "sbc a,", "and ", "xor ", "or ", "cp "
  68 } ;
  69 static const char * arit_str_gbz80[] =
  70 {
  71   "add a,", "adc a,", "sub a,", "sbc a,", "and ", "xor ", "or ", "cp "
  72 } ;
  73 static const char * arit_str_ez80[] =
  74 {
  75   "add a,", "adc a,", "sub a,", "sbc a,", "and a,", "xor a,", "or a,", "cp a,"
  76 } ;
  77
  78 \f
  79 static int
  80 mach_inst (struct buffer *buf, const struct tab_elt *p)
  81 {
  82   return !p->inss || (p->inss & buf->inss);
  83 }
  84
  85 static int
  86 fetch_data (struct buffer *buf, disassemble_info * info, int n)
  87 {
  88   int r;
  89
  90   if (buf->n_fetch + n > (int)sizeof (buf->data))
  91     abort ();
  92
  93   r = info->read_memory_func (buf->base + buf->n_fetch,
  94                               (unsigned char*) buf->data + buf->n_fetch,
  95                               n, info);
  96   if (r == 0)
  97     buf->n_fetch += n;
  98   return !r;
  99 }
 100
 101 static int
 102 prt (struct buffer *buf, disassemble_info * info, const char *txt)
 103 {
 104   info->fprintf_func (info->stream, "%s", txt);
 105   buf->n_used = buf->n_fetch;
 106   return 1;
 107 }
 108
 109 static int
 110 prt_e (struct buffer *buf, disassemble_info * info, const char *txt)
 111 {
 112   char e;
 113   int target_addr;
 114
 115   if (fetch_data (buf, info, 1))
 116     {
 117       e = buf->data[1];
 118       target_addr = (buf->base + 2 + e) & 0xffff;
 119       buf->n_used = buf->n_fetch;
 120       info->fprintf_func (info->stream, "%s0x%04x", txt, target_addr);
 121     }
 122   else
 123     buf->n_used = -1;
 124
 125   return buf->n_used;
 126 }
 127
 128 static int
 129 jr_cc (struct buffer *buf, disassemble_info * info, const char *txt)
 130 {
 131   char mytxt[TXTSIZ];
 132
 133   snprintf (mytxt, TXTSIZ, txt, cc_str[(buf->data[0] >> 3) & 3]);
 134   return prt_e (buf, info, mytxt);
 135 }
 136
 137 static int
 138 prt_nn (struct buffer *buf, disassemble_info * info, const char *txt)
 139 {
 140   int nn;
 141   unsigned char *p;
 142   int i;
 143
 144   p = (unsigned char*) buf->data + buf->n_fetch;
 145   if (fetch_data (buf, info, buf->nn_len))
 146     {
 147       nn = 0;
 148       i = buf->nn_len;
 149       while (i--)
 150         nn = nn * 0x100 + p[i];
 151       info->fprintf_func (info->stream, txt, nn);
 152       buf->n_used = buf->n_fetch;
 153     }
 154   else
 155     buf->n_used = -1;
 156   return buf->n_used;
 157 }
 158
 159 static int
 160 prt_rr_nn (struct buffer *buf, disassemble_info * info, const char *txt)
 161 {
 162   char mytxt[TXTSIZ];
 163   int rr;
 164
 165   rr = (buf->data[buf->n_fetch - 1] >> 4) & 3;
 166   snprintf (mytxt, TXTSIZ, txt, rr_str[rr]);
 167   return prt_nn (buf, info, mytxt);
 168 }
 169
 170 static int
 171 prt_rr (struct buffer *buf, disassemble_info * info, const char *txt)
 172 {
 173   info->fprintf_func (info->stream, "%s%s", txt,
 174                       rr_str[(buf->data[buf->n_fetch - 1] >> 4) & 3]);
 175   buf->n_used = buf->n_fetch;
 176   return buf->n_used;
 177 }
 178
 179 static int
 180 prt_n (struct buffer *buf, disassemble_info * info, const char *txt)
 181 {
 182   int n;
 183   unsigned char *p;
 184
 185   p = (unsigned char*) buf->data + buf->n_fetch;
 186
 187   if (fetch_data (buf, info, 1))
 188     {
 189       n = p[0];
 190       info->fprintf_func (info->stream, txt, n);
 191       buf->n_used = buf->n_fetch;
 192     }
 193   else
 194     buf->n_used = -1;
 195
 196   return buf->n_used;
 197 }
 198
 199 static int
 200 prt_n_n (struct buffer *buf, disassemble_info * info, const char *txt)
 201 {
 202   char mytxt[TXTSIZ];
 203   int n;
 204   unsigned char *p;
 205
 206   p = (unsigned char*) buf->data + buf->n_fetch;
 207
 208   if (fetch_data (buf, info, 1))
 209     {
 210       n = p[0];
 211       snprintf (mytxt, TXTSIZ, txt, n);
 212       buf->n_used = buf->n_fetch;
 213     }
 214   else
 215     buf->n_used = -1;
 216
 217   return prt_n (buf, info, mytxt);
 218 }
 219
 220 static int
 221 prt_r_n (struct buffer *buf, disassemble_info * info, const char *txt)
 222 {
 223   char mytxt[TXTSIZ];
 224   int r;
 225
 226   r = (buf->data[buf->n_fetch - 1] >> 3) & 7;
 227   snprintf (mytxt, TXTSIZ, txt, r_str[r]);
 228   return prt_n (buf, info, mytxt);
 229 }
 230
 231 static int
 232 ld_r_n (struct buffer *buf, disassemble_info * info, const char *txt)
 233 {
 234   char mytxt[TXTSIZ];
 235
 236   snprintf (mytxt, TXTSIZ, txt, r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]);
 237   return prt_n (buf, info, mytxt);
 238 }
 239
 240 static int
 241 prt_r (struct buffer *buf, disassemble_info * info, const char *txt)
 242 {
 243   info->fprintf_func (info->stream, txt,
 244                       r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]);
 245   buf->n_used = buf->n_fetch;
 246   return buf->n_used;
 247 }
 248
 249 static int
 250 ld_r_r (struct buffer *buf, disassemble_info * info, const char *txt)
 251 {
 252   info->fprintf_func (info->stream, txt,
 253                       r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7],
 254                       r_str[buf->data[buf->n_fetch - 1] & 7]);
 255   buf->n_used = buf->n_fetch;
 256   return buf->n_used;
 257 }
 258
 259 static int
 260 prt_d (struct buffer *buf, disassemble_info * info, const char *txt)
 261 {
 262   int d;
 263   signed char *p;
 264
 265   p = buf->data + buf->n_fetch;
 266
 267   if (fetch_data (buf, info, 1))
 268     {
 269       d = p[0];
 270       info->fprintf_func (info->stream, txt, d);
 271       buf->n_used = buf->n_fetch;
 272     }
 273   else
 274     buf->n_used = -1;
 275
 276   return buf->n_used;
 277 }
 278
 279 static int
 280 prt_rr_d (struct buffer *buf, disassemble_info * info, const char *txt)
 281 {
 282   char mytxt[TXTSIZ];
 283   int rr;
 284
 285   rr = (buf->data[buf->n_fetch - 1] >> 4) & 3;
 286   if (rr == 3) /* SP is not supported */
 287     return 0;
 288
 289   snprintf (mytxt, TXTSIZ, txt, rr_str[rr]);
 290   return prt_d (buf, info, mytxt);
 291 }
 292
 293 static int
 294 arit_r (struct buffer *buf, disassemble_info * info, const char *txt)
 295 {
 296   const char * const *arit;
 297
 298   if (buf->inss & INSS_EZ80)
 299     arit = arit_str_ez80;
 300   else if (buf->inss & INSS_GBZ80)
 301     arit = arit_str_gbz80;
 302   else
 303     arit = arit_str;
 304
 305   info->fprintf_func (info->stream, txt,
 306                       arit[(buf->data[buf->n_fetch - 1] >> 3) & 7],
 307                       r_str[buf->data[buf->n_fetch - 1] & 7]);
 308   buf->n_used = buf->n_fetch;
 309   return buf->n_used;
 310 }
 311
 312 static int
 313 prt_cc (struct buffer *buf, disassemble_info * info, const char *txt)
 314 {
 315   info->fprintf_func (info->stream, "%s%s", txt,
 316                       cc_str[(buf->data[0] >> 3) & 7]);
 317   buf->n_used = buf->n_fetch;
 318   return buf->n_used;
 319 }
 320
 321 static int
 322 pop_rr (struct buffer *buf, disassemble_info * info, const char *txt)
 323 {
 324   static char *rr_stack[] = { "bc","de","hl","af"};
 325
 326   info->fprintf_func (info->stream, "%s %s", txt,
 327                       rr_stack[(buf->data[0] >> 4) & 3]);
 328   buf->n_used = buf->n_fetch;
 329   return buf->n_used;
 330 }
 331
 332
 333 static int
 334 jp_cc_nn (struct buffer *buf, disassemble_info * info, const char *txt)
 335 {
 336   char mytxt[TXTSIZ];
 337
 338   snprintf (mytxt,TXTSIZ,
 339             "%s%s,0x%%04x", txt, cc_str[(buf->data[0] >> 3) & 7]);
 340   return prt_nn (buf, info, mytxt);
 341 }
 342
 343 static int
 344 arit_n (struct buffer *buf, disassemble_info * info, const char *txt)
 345 {
 346   char mytxt[TXTSIZ];
 347   const char * const *arit;
 348
 349   if (buf->inss & INSS_EZ80)
 350     arit = arit_str_ez80;
 351   else if (buf->inss & INSS_GBZ80)
 352     arit = arit_str_gbz80;
 353   else
 354     arit = arit_str;
 355
 356   snprintf (mytxt,TXTSIZ, txt, arit[(buf->data[0] >> 3) & 7]);
 357   return prt_n (buf, info, mytxt);
 358 }
 359
 360 static int
 361 rst (struct buffer *buf, disassemble_info * info, const char *txt)
 362 {
 363   info->fprintf_func (info->stream, txt, buf->data[0] & 0x38);
 364   buf->n_used = buf->n_fetch;
 365   return buf->n_used;
 366 }
 367
 368
 369 static int
 370 cis (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED)
 371 {
 372   static char * opar[] = { "ld", "cp", "in", "out" };
 373   char * op;
 374   char c;
 375
 376   c = buf->data[1];
 377   op = ((0x13 & c) == 0x13) ? "ot" : (opar[c & 3]);
 378   info->fprintf_func (info->stream,
 379                       "%s%c%s", op,
 380                       (c & 0x08) ? 'd' : 'i',
 381                       (c & 0x10) ? "r" : "");
 382   buf->n_used = 2;
 383   return buf->n_used;
 384 }
 385
 386 static int
 387 cism (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED)
 388 {
 389   static char * opar[] = { "in%cm%s", "ot%cm%s" };
 390   char * op;
 391   char c;
 392
 393   c = buf->data[1];
 394   op = opar[c & 1];
 395   info->fprintf_func (info->stream,
 396                       op,
 397                       (c & 0x08) ? 'd' : 'i',
 398                       (c & 0x10) ? "r" : "");
 399   buf->n_used = 2;
 400   return buf->n_used;
 401 }
 402
 403 static int
 404 dump (struct buffer *buf, disassemble_info * info, const char *txt)
 405 {
 406   int i;
 407
 408   info->fprintf_func (info->stream, "defb ");
 409   for (i = 0; txt[i]; ++i)
 410     info->fprintf_func (info->stream, i ? ", 0x%02x" : "0x%02x",
 411                         (unsigned char) buf->data[i]);
 412   buf->n_used = i;
 413   return buf->n_used;
 414 }
 415
 416 /* Table to disassemble machine codes with prefix 0xED.  */
 417 struct tab_elt opc_ed[] =
 418 {
 419   { 0x30, 0xFF, prt, "mul d,e", INSS_Z80N },
 420   { 0x31, 0xFF, prt, "add hl,a", INSS_Z80N },
 421   { 0x31, 0xFF, prt, "ld iy,(hl)", INSS_EZ80 },
 422   { 0x30, 0xFE, dump, "xx", INSS_ALL }, /* do not move this line */
 423   { 0x00, 0xC7, prt_r_n, "in0 %s,(0x%%02x)", INSS_Z180|INSS_EZ80 },
 424   { 0x01, 0xC7, prt_r_n, "out0 (0x%%02x),%s", INSS_Z180|INSS_EZ80 },
 425   { 0x32, 0xFF, prt_d, "lea ix,ix%+d", INSS_EZ80 },
 426   { 0x33, 0xFF, prt_d, "lea iy,iy%+d", INSS_EZ80 },
 427   { 0x02, 0xCF, prt_rr_d, "lea %s,ix%%+d", INSS_EZ80 },
 428   { 0x03, 0xCF, prt_rr_d, "lea %s,iy%%+d", INSS_EZ80 },
 429   { 0x04, 0xC7, prt_r, "tst %s", INSS_Z180},
 430   { 0x04, 0xC7, prt_r, "tst a,%s", INSS_EZ80 },
 431   { 0x07, 0xFF, prt, "ld bc,(hl)", INSS_EZ80 },
 432   { 0x3F, 0xFF, prt, "ld (hl),ix", INSS_EZ80 },
 433   { 0x0F, 0xCF, prt_rr, "ld (hl),", INSS_EZ80 },
 434   { 0x17, 0xFF, prt, "ld de,(hl)", INSS_EZ80 },
 435   { 0x23, 0xFF, prt, "swapnib", INSS_Z80N },
 436   { 0x24, 0xFF, prt, "mirror", INSS_Z80N },
 437   { 0x27, 0xFF, prt, "ld hl,(hl)", INSS_EZ80 },
 438   { 0x27, 0xFF, prt_n, "test 0x%02x", INSS_Z80N },
 439   { 0x28, 0xFF, prt, "bsla de,b", INSS_Z80N },
 440   { 0x29, 0xFF, prt, "bsra de,b", INSS_Z80N },
 441   { 0x2A, 0xFF, prt, "bsrl de,b", INSS_Z80N },
 442   { 0x2B, 0xFF, prt, "bsrf de,b", INSS_Z80N },
 443   { 0x2C, 0xFF, prt, "bslc de,b", INSS_Z80N },
 444   { 0x32, 0xFF, prt, "add de,a", INSS_Z80N },
 445   { 0x33, 0xFF, prt, "add bc,a", INSS_Z80N },
 446   { 0x34, 0xFF, prt_nn, "add hl,0x%04x", INSS_Z80N },
 447   { 0x35, 0xFF, prt_nn, "add de,0x%04x", INSS_Z80N },
 448   { 0x36, 0xFF, prt_nn, "add bc,0x%04x", INSS_Z80N },
 449   { 0x37, 0xFF, prt, "ld ix,(hl)", INSS_EZ80 },
 450   { 0x3E, 0xFF, prt, "ld (hl),iy", INSS_EZ80 },
 451   { 0x70, 0xFF, prt, "in f,(c)", INSS_Z80 | INSS_R800 | INSS_Z80N },
 452   { 0x70, 0xFF, dump, "xx", INSS_ALL },
 453   { 0x40, 0xC7, prt_r, "in %s,(bc)", INSS_EZ80 },
 454   { 0x40, 0xC7, prt_r, "in %s,(c)", INSS_ALL },
 455   { 0x71, 0xFF, prt, "out (c),0", INSS_Z80 | INSS_Z80N },
 456   { 0x71, 0xFF, dump, "xx", INSS_ALL },
 457   { 0x41, 0xC7, prt_r, "out (bc),%s", INSS_EZ80 },
 458   { 0x41, 0xC7, prt_r, "out (c),%s", INSS_ALL },
 459   { 0x42, 0xCF, prt_rr, "sbc hl,", INSS_ALL },
 460   { 0x43, 0xCF, prt_rr_nn, "ld (0x%%04x),%s", INSS_ALL },
 461   { 0x44, 0xFF, prt, "neg", INSS_ALL },
 462   { 0x45, 0xFF, prt, "retn", INSS_ALL },
 463   { 0x46, 0xFF, prt, "im 0", INSS_ALL },
 464   { 0x47, 0xFF, prt, "ld i,a", INSS_ALL },
 465   { 0x4A, 0xCF, prt_rr, "adc hl,", INSS_ALL },
 466   { 0x4B, 0xCF, prt_rr_nn, "ld %s,(0x%%04x)", INSS_ALL },
 467   { 0x4C, 0xCF, prt_rr, "mlt ", INSS_Z180|INSS_EZ80 },
 468   { 0x4D, 0xFF, prt, "reti", INSS_ALL },
 469   { 0x4F, 0xFF, prt, "ld r,a", INSS_ALL },
 470   { 0x54, 0xFF, prt_d, "lea ix,iy%+d", INSS_EZ80 },
 471   { 0x55, 0xFF, prt_d, "lea iy,ix%+d", INSS_EZ80 },
 472   { 0x56, 0xFF, prt, "im 1", INSS_ALL },
 473   { 0x57, 0xFF, prt, "ld a,i", INSS_ALL },
 474   { 0x5E, 0xFF, prt, "im 2", INSS_ALL },
 475   { 0x5F, 0xFF, prt, "ld a,r", INSS_ALL },
 476   { 0x64, 0xFF, prt_n, "tst 0x%02x", INSS_Z180 },
 477   { 0x64, 0xFF, prt_n, "tst a,0x%02x", INSS_EZ80 },
 478   { 0x65, 0xFF, prt_d, "pea ix%+d", INSS_EZ80 },
 479   { 0x66, 0xFF, prt_d, "pea iy%+d", INSS_EZ80 },
 480   { 0x67, 0xFF, prt, "rrd", INSS_ALL },
 481   { 0x6D, 0xFF, prt, "ld mb,a", INSS_EZ80 },
 482   { 0x6E, 0xFF, prt, "ld a,mb", INSS_EZ80 },
 483   { 0x6F, 0xFF, prt, "rld", INSS_ALL },
 484   { 0x74, 0xFF, prt_n, "tstio 0x%02x", INSS_Z180|INSS_EZ80 },
 485   { 0x76, 0xFF, prt, "slp", INSS_Z180|INSS_EZ80 },
 486   { 0x7D, 0xFF, prt, "stmix", INSS_EZ80 },
 487   { 0x7E, 0xFF, prt, "rsmix", INSS_EZ80 },
 488   { 0x82, 0xE6, cism, "", INSS_Z180|INSS_EZ80 },
 489   { 0x84, 0xFF, prt, "ini2", INSS_EZ80 },
 490   { 0x8A, 0xFF, prt_n_n, "push 0x%02x%%02x", INSS_Z80N },
 491   { 0x8C, 0xFF, prt, "ind2", INSS_EZ80 },
 492   { 0x90, 0xFF, prt, "outinb", INSS_Z80N },
 493   { 0x91, 0xFF, prt_n_n, "nextreg 0x%02x,0x%%02x", INSS_Z80N },
 494   { 0x92, 0xFF, prt_n, "nextreg 0x%02x,a", INSS_Z80N },
 495   { 0x93, 0xFF, prt, "pixeldn", INSS_Z80N },
 496   { 0x94, 0xFF, prt, "ini2r", INSS_EZ80 },
 497   { 0x94, 0xFF, prt, "pixelad", INSS_Z80N },
 498   { 0x95, 0xFF, prt, "setae", INSS_Z80N },
 499   { 0x98, 0xFF, prt, "jp (c)", INSS_Z80N },
 500   { 0x9c, 0xFF, prt, "ind2r", INSS_EZ80 },
 501   { 0xA0, 0xE4, cis, "", INSS_ALL },
 502   { 0xA4, 0xFF, prt, "outi2", INSS_EZ80 },
 503   { 0xA4, 0xFF, prt, "ldix", INSS_Z80N },
 504   { 0xAC, 0xFF, prt, "outd2", INSS_EZ80 },
 505   { 0xAC, 0xFF, prt, "lddx", INSS_Z80N },
 506   { 0xA5, 0xFF, prt, "ldws", INSS_Z80N },
 507   { 0xB4, 0xFF, prt, "oti2r", INSS_EZ80 },
 508   { 0xB4, 0xFF, prt, "ldirx", INSS_Z80N },
 509   { 0xB7, 0xFF, prt, "ldpirx", INSS_Z80N },
 510   { 0xBC, 0xFF, prt, "otd2r", INSS_EZ80 },
 511   { 0xBC, 0xFF, prt, "lddrx", INSS_Z80N },
 512   { 0xC2, 0xFF, prt, "inirx", INSS_EZ80 },
 513   { 0xC3, 0xFF, prt, "otirx", INSS_EZ80 },
 514   { 0xC7, 0xFF, prt, "ld i,hl", INSS_EZ80 },
 515   { 0xCA, 0xFF, prt, "indrx", INSS_EZ80 },
 516   { 0xCB, 0xFF, prt, "otdrx", INSS_EZ80 },
 517   { 0xC3, 0xFF, prt, "muluw hl,bc", INSS_R800 },
 518   { 0xC5, 0xE7, prt_r, "mulub a,%s", INSS_R800 },
 519   { 0xD7, 0xFF, prt, "ld hl,i", INSS_EZ80 },
 520   { 0xF3, 0xFF, prt, "muluw hl,sp", INSS_R800 },
 521   { 0x00, 0x00, dump, "xx", INSS_ALL }
 522 };
 523
 524 static int
 525 pref_ed (struct buffer *buf, disassemble_info *info,
 526          const char *txt ATTRIBUTE_UNUSED)
 527 {
 528   struct tab_elt *p;
 529
 530   if (fetch_data (buf, info, 1))
 531     {
 532       for (p = opc_ed; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p)
 533         ;
 534       p->fp (buf, info, p->text);
 535     }
 536   else
 537     buf->n_used = -1;
 538
 539   return buf->n_used;
 540 }
 541 \f
 542 /* Instruction names for the instructions addressing single bits.  */
 543 static char *cb1_str[] = { "", "bit", "res", "set"};
 544 /* Instruction names for shifts and rotates.  */
 545 static char *cb2_str[] =
 546 {
 547   "rlc", "rrc", "rl", "rr", "sla", "sra", "sli", "srl"
 548 };
 549
 550 static int
 551 pref_cb (struct buffer *buf, disassemble_info *info,
 552          const char *txt ATTRIBUTE_UNUSED)
 553 {
 554   const char *op_txt;
 555   int idx;
 556   if (fetch_data (buf, info, 1))
 557     {
 558       buf->n_used = 2;
 559       if ((buf->data[1] & 0xc0) == 0)
 560         {
 561           idx = (buf->data[1] >> 3) & 7;
 562           if ((buf->inss & INSS_GBZ80) && (idx == 6))
 563             op_txt = "swap";
 564           else
 565             op_txt = cb2_str[idx];
 566           info->fprintf_func (info->stream, "%s %s",
 567                               op_txt,
 568                               r_str[buf->data[1] & 7]);
 569         }
 570       else
 571         info->fprintf_func (info->stream, "%s %d,%s",
 572                             cb1_str[(buf->data[1] >> 6) & 3],
 573                             (buf->data[1] >> 3) & 7,
 574                             r_str[buf->data[1] & 7]);
 575     }
 576   else
 577     buf->n_used = -1;
 578
 579   return buf->n_used;
 580 }
 581
 582 static int
 583 addvv (struct buffer * buf, disassemble_info * info, const char *txt)
 584 {
 585   info->fprintf_func (info->stream, "add %s,%s", txt, txt);
 586
 587   return buf->n_used = buf->n_fetch;
 588 }
 589
 590 static int
 591 ld_v_v (struct buffer * buf, disassemble_info * info, const char *txt)
 592 {
 593   char mytxt[TXTSIZ];
 594
 595   snprintf (mytxt, TXTSIZ, "ld %s%%s,%s%%s", txt, txt);
 596   return ld_r_r (buf, info, mytxt);
 597 }
 598
 599 static int
 600 prt_d_n (struct buffer *buf, disassemble_info * info, const char *txt)
 601 {
 602   char mytxt[TXTSIZ];
 603   int d;
 604   signed char *p;
 605
 606   p = buf->data + buf->n_fetch;
 607
 608   if (fetch_data (buf, info, 1))
 609     {
 610       d = p[0];
 611       snprintf (mytxt, TXTSIZ, txt, d);
 612       return prt_n (buf, info, mytxt);
 613     }
 614   else
 615     buf->n_used = -1;
 616
 617   return buf->n_used;
 618 }
 619
 620 static int
 621 arit_d (struct buffer *buf, disassemble_info * info, const char *txt)
 622 {
 623   char mytxt[TXTSIZ];
 624   signed char c;
 625   const char * const *arit;
 626
 627   arit = (buf->inss & INSS_EZ80) ? arit_str_ez80 : arit_str;
 628   c = buf->data[buf->n_fetch - 1];
 629   snprintf (mytxt, TXTSIZ, txt, arit[(c >> 3) & 7]);
 630   return prt_d (buf, info, mytxt);
 631 }
 632
 633 static int
 634 ld_r_d (struct buffer *buf, disassemble_info * info, const char *txt)
 635 {
 636   char mytxt[TXTSIZ];
 637   signed char c;
 638
 639   c = buf->data[buf->n_fetch - 1];
 640   snprintf (mytxt, TXTSIZ, txt, r_str[(c >> 3) & 7]);
 641   return prt_d (buf, info, mytxt);
 642 }
 643
 644 static int
 645 ld_d_r (struct buffer *buf, disassemble_info * info, const char *txt)
 646 {
 647   char mytxt[TXTSIZ];
 648   signed char c;
 649
 650   c = buf->data[buf->n_fetch - 1];
 651   snprintf (mytxt, TXTSIZ, txt, r_str[c & 7]);
 652   return prt_d (buf, info, mytxt);
 653 }
 654
 655 static int
 656 ld_ii_ii (struct buffer *buf, disassemble_info * info, const char *txt)
 657 {
 658   char mytxt[TXTSIZ];
 659   signed char c;
 660   int p;
 661   static const char *ii[2] = { "ix", "iy" };
 662
 663   p = (buf->data[buf->n_fetch - 2] == (signed char) 0xdd) ? 0 : 1;
 664   c = buf->data[buf->n_fetch - 1];
 665   if ((c & 0x07) != 0x07)
 666     p = 1 - p; /* 0 -> 1, 1 -> 0 */
 667   snprintf (mytxt, TXTSIZ, txt, ii[p]);
 668   return prt_d (buf, info, mytxt);
 669 }
 670
 671 static int
 672 pref_xd_cb (struct buffer * buf, disassemble_info * info, const char *txt)
 673 {
 674   if (fetch_data (buf, info, 2))
 675     {
 676       int d;
 677       char arg[TXTSIZ];
 678       signed char *p;
 679
 680       buf->n_used = 4;
 681       p = buf->data;
 682       d = p[2];
 683
 684       if (((p[3] & 0xC0) == 0x40) || ((p[3] & 7) == 0x06))
 685         snprintf (arg, TXTSIZ, "(%s%+d)", txt, d);
 686       else
 687         snprintf (arg, TXTSIZ, "(%s%+d),%s", txt, d, r_str[p[3] & 7]);
 688
 689       if ((p[3] & 0xc0) == 0)
 690         info->fprintf_func (info->stream, "%s %s",
 691                             cb2_str[(buf->data[3] >> 3) & 7],
 692                             arg);
 693       else
 694         info->fprintf_func (info->stream, "%s %d,%s",
 695                             cb1_str[(buf->data[3] >> 6) & 3],
 696                             (buf->data[3] >> 3) & 7,
 697                             arg);
 698     }
 699   else
 700     buf->n_used = -1;
 701
 702   return buf->n_used;
 703 }
 704 \f
 705 /* Table to disassemble machine codes with prefix 0xDD or 0xFD.  */
 706 static struct tab_elt opc_ind[] =
 707 {
 708   { 0x07, 0xFF, prt_d, "ld bc,(%s%%+d)", INSS_EZ80 },
 709   { 0x0F, 0xFF, prt_d, "ld (%s%%+d),bc", INSS_EZ80 },
 710   { 0x17, 0xFF, prt_d, "ld de,(%s%%+d)", INSS_EZ80 },
 711   { 0x1F, 0xFF, prt_d, "ld (%s%%+d),de", INSS_EZ80 },
 712   { 0x24, 0xF7, prt_r, "inc %s%%s", INSS_ALL },
 713   { 0x25, 0xF7, prt_r, "dec %s%%s", INSS_ALL },
 714   { 0x26, 0xF7, ld_r_n, "ld %s%%s,0x%%%%02x", INSS_ALL },
 715   { 0x27, 0xFF, prt_d, "ld hl,(%s%%+d)", INSS_EZ80 },
 716   { 0x2F, 0xFF, prt_d, "ld (%s%%+d),hl", INSS_EZ80 },
 717   { 0x21, 0xFF, prt_nn, "ld %s,0x%%04x", INSS_ALL },
 718   { 0x22, 0xFF, prt_nn, "ld (0x%%04x),%s", INSS_ALL },
 719   { 0x2A, 0xFF, prt_nn, "ld %s,(0x%%04x)", INSS_ALL },
 720   { 0x23, 0xFF, prt, "inc %s", INSS_ALL },
 721   { 0x2B, 0xFF, prt, "dec %s", INSS_ALL },
 722   { 0x29, 0xFF, addvv, "%s", INSS_ALL },
 723   { 0x31, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 },
 724   { 0x37, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 },
 725   { 0x3E, 0xFE, ld_ii_ii, "ld (%s%%%%+d),%%s", INSS_EZ80 },
 726   { 0x09, 0xCF, prt_rr, "add %s,", INSS_ALL },
 727   { 0x34, 0xFF, prt_d, "inc (%s%%+d)", INSS_ALL },
 728   { 0x35, 0xFF, prt_d, "dec (%s%%+d)", INSS_ALL },
 729   { 0x36, 0xFF, prt_d_n, "ld (%s%%+d),0x%%%%02x", INSS_ALL },
 730
 731   { 0x76, 0xFF, dump, "h", INSS_ALL },
 732   { 0x46, 0xC7, ld_r_d, "ld %%s,(%s%%%%+d)", INSS_ALL },
 733   { 0x70, 0xF8, ld_d_r, "ld (%s%%%%+d),%%s", INSS_ALL },
 734   { 0x64, 0xF6, ld_v_v, "%s", INSS_ALL },
 735   { 0x60, 0xF0, ld_r_r, "ld %s%%s,%%s", INSS_ALL },
 736   { 0x44, 0xC6, ld_r_r, "ld %%s,%s%%s", INSS_ALL },
 737
 738   { 0x86, 0xC7, arit_d, "%%s(%s%%%%+d)", INSS_ALL },
 739   { 0x84, 0xC6, arit_r, "%%s%s%%s", INSS_ALL },
 740
 741   { 0xE1, 0xFF, prt, "pop %s", INSS_ALL },
 742   { 0xE5, 0xFF, prt, "push %s", INSS_ALL },
 743   { 0xCB, 0xFF, pref_xd_cb, "%s", INSS_ALL },
 744   { 0xE3, 0xFF, prt, "ex (sp),%s", INSS_ALL },
 745   { 0xE9, 0xFF, prt, "jp (%s)", INSS_ALL },
 746   { 0xF9, 0xFF, prt, "ld sp,%s", INSS_ALL },
 747   { 0x00, 0x00, dump, "?", INSS_ALL },
 748 } ;
 749
 750 static int
 751 pref_ind (struct buffer *buf, disassemble_info *info, const char *txt)
 752 {
 753   if (fetch_data (buf, info, 1))
 754     {
 755       char mytxt[TXTSIZ];
 756       struct tab_elt *p;
 757
 758       for (p = opc_ind; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p)
 759         ;
 760       snprintf (mytxt, TXTSIZ, p->text, txt);
 761       p->fp (buf, info, mytxt);
 762     }
 763   else
 764     buf->n_used = -1;
 765
 766   return buf->n_used;
 767 }
 768
 769 static int
 770 print_insn_z80_buf (struct buffer *buf, disassemble_info *info);
 771
 772 static int
 773 suffix (struct buffer *buf, disassemble_info *info, const char *txt)
 774 {
 775   char mybuf[TXTSIZ*4];
 776   fprintf_ftype old_fprintf;
 777   void *old_stream;
 778   char *p;
 779
 780   switch (txt[2])
 781     {
 782     case 'l': /* SIL or LIL */
 783       buf->nn_len = 3;
 784       break;
 785     case 's': /* SIS or LIS */
 786       buf->nn_len = 2;
 787       break;
 788     default:
 789       abort ();
 790     }
 791   if (!fetch_data (buf, info, 1)
 792       || buf->data[1] == 0x40
 793       || buf->data[1] == 0x49
 794       || buf->data[1] == 0x52
 795       || buf->data[1] == 0x5b)
 796     {
 797       /* Double prefix, or end of data.  */
 798       info->fprintf_func (info->stream, ".db 0x%02x ; %s", (unsigned)buf->data[0], txt);
 799       buf->n_used = 1;
 800       return buf->n_used;
 801     }
 802
 803   old_fprintf = info->fprintf_func;
 804   old_stream = info->stream;
 805   info->fprintf_func = (fprintf_ftype) &sprintf;
 806   info->stream = mybuf;
 807   mybuf[0] = 0;
 808   buf->base++;
 809   if (print_insn_z80_buf (buf, info) >= 0)
 810     buf->n_used++;
 811   info->fprintf_func = old_fprintf;
 812   info->stream = old_stream;
 813
 814   for (p = mybuf; *p; ++p)
 815     if (*p == ' ')
 816       break;
 817   if (*p)
 818     {
 819       *p++ = '\0';
 820       info->fprintf_func (info->stream, "%s.%s %s", mybuf, txt, p);
 821     }
 822   else
 823     info->fprintf_func (info->stream, "%s.%s", mybuf, txt);
 824   return buf->n_used;
 825 }
 826
 827 /* Table to disassemble machine codes without prefix.  */
 828 static const struct tab_elt
 829 opc_main[] =
 830 {
 831   { 0x00, 0xFF, prt, "nop", INSS_ALL },
 832   { 0x01, 0xCF, prt_rr_nn, "ld %s,0x%%04x", INSS_ALL },
 833   { 0x02, 0xFF, prt, "ld (bc),a", INSS_ALL },
 834   { 0x03, 0xCF, prt_rr, "inc ", INSS_ALL },
 835   { 0x04, 0xC7, prt_r, "inc %s", INSS_ALL },
 836   { 0x05, 0xC7, prt_r, "dec %s", INSS_ALL },
 837   { 0x06, 0xC7, ld_r_n, "ld %s,0x%%02x", INSS_ALL },
 838   { 0x07, 0xFF, prt, "rlca", INSS_ALL },
 839   { 0x08, 0xFF, prt, "ex af,af'", ~INSS_GBZ80 },
 840   { 0x09, 0xCF, prt_rr, "add hl,", INSS_ALL },
 841   { 0x0A, 0xFF, prt, "ld a,(bc)", INSS_ALL },
 842   { 0x0B, 0xCF, prt_rr, "dec ", INSS_ALL },
 843   { 0x0F, 0xFF, prt, "rrca", INSS_ALL },
 844   { 0x10, 0xFF, prt_e, "djnz ", ~INSS_GBZ80 },
 845   { 0x12, 0xFF, prt, "ld (de),a", INSS_ALL },
 846   { 0x17, 0xFF, prt, "rla", INSS_ALL },
 847   { 0x18, 0xFF, prt_e, "jr ", INSS_ALL },
 848   { 0x1A, 0xFF, prt, "ld a,(de)", INSS_ALL },
 849   { 0x1F, 0xFF, prt, "rra", INSS_ALL },
 850   { 0x20, 0xE7, jr_cc, "jr %s,", INSS_ALL },
 851   { 0x22, 0xFF, prt_nn, "ld (0x%04x),hl", ~INSS_GBZ80 },
 852   { 0x27, 0xFF, prt, "daa", INSS_ALL },
 853   { 0x2A, 0xFF, prt_nn, "ld hl,(0x%04x)", ~INSS_GBZ80 },
 854   { 0x2F, 0xFF, prt, "cpl", INSS_ALL },
 855   { 0x32, 0xFF, prt_nn, "ld (0x%04x),a", INSS_ALL },
 856   { 0x37, 0xFF, prt, "scf", INSS_ALL },
 857   { 0x3A, 0xFF, prt_nn, "ld a,(0x%04x)", INSS_ALL },
 858   { 0x3F, 0xFF, prt, "ccf", INSS_ALL },
 859
 860   { 0x76, 0xFF, prt, "halt", INSS_ALL },
 861
 862   { 0x40, 0xFF, suffix, "sis", INSS_EZ80 },
 863   { 0x49, 0xFF, suffix, "lis", INSS_EZ80 },
 864   { 0x52, 0xFF, suffix, "sil", INSS_EZ80 },
 865   { 0x5B, 0xFF, suffix, "lil", INSS_EZ80 },
 866
 867   { 0x40, 0xC0, ld_r_r, "ld %s,%s", INSS_ALL},
 868
 869   { 0x80, 0xC0, arit_r, "%s%s", INSS_ALL },
 870
 871   { 0xC0, 0xC7, prt_cc, "ret ", INSS_ALL },
 872   { 0xC1, 0xCF, pop_rr, "pop", INSS_ALL },
 873   { 0xC2, 0xC7, jp_cc_nn, "jp ", INSS_ALL },
 874   { 0xC3, 0xFF, prt_nn, "jp 0x%04x", INSS_ALL },
 875   { 0xC4, 0xC7, jp_cc_nn, "call ", INSS_ALL },
 876   { 0xC5, 0xCF, pop_rr, "push", INSS_ALL },
 877   { 0xC6, 0xC7, arit_n, "%s0x%%02x", INSS_ALL },
 878   { 0xC7, 0xC7, rst, "rst 0x%02x", INSS_ALL },
 879   { 0xC9, 0xFF, prt, "ret", INSS_ALL },
 880   { 0xCB, 0xFF, pref_cb, "", INSS_ALL },
 881   { 0xCD, 0xFF, prt_nn, "call 0x%04x", INSS_ALL },
 882   { 0xD3, 0xFF, prt_n, "out (0x%02x),a", ~INSS_GBZ80 },
 883   { 0xD9, 0xFF, prt, "exx", ~INSS_GBZ80 },
 884   { 0xDB, 0xFF, prt_n, "in a,(0x%02x)", ~INSS_GBZ80 },
 885   { 0xDD, 0xFF, pref_ind, "ix", ~INSS_GBZ80 },
 886   { 0xE3, 0xFF, prt, "ex (sp),hl", ~INSS_GBZ80 },
 887   { 0xE9, 0xFF, prt, "jp (hl)", INSS_ALL },
 888   { 0xEB, 0xFF, prt, "ex de,hl", ~INSS_GBZ80 },
 889   { 0xED, 0xFF, pref_ed, "", ~INSS_GBZ80 },
 890   { 0xF3, 0xFF, prt, "di", INSS_ALL },
 891   { 0xF9, 0xFF, prt, "ld sp,hl", INSS_ALL },
 892   { 0xFB, 0xFF, prt, "ei", INSS_ALL },
 893   { 0xFD, 0xFF, pref_ind, "iy", ~INSS_GBZ80 },
 894   { 0x00, 0x00, prt, "????", INSS_ALL },
 895 } ;
 896
 897 /* Separate GBZ80 main opcode table due to many differences */
 898 static const struct tab_elt
 899 opc_main_gbz80[] =
 900 {
 901   { 0x00, 0xFF, prt,"nop", INSS_ALL },
 902   { 0x01, 0xCF, prt_rr_nn, "ld %s,0x%%04x", INSS_ALL },
 903   { 0x02, 0xFF, prt, "ld (bc),a", INSS_ALL },
 904   { 0x03, 0xCF, prt_rr, "inc ", INSS_ALL },
 905   { 0x04, 0xC7, prt_r, "inc %s", INSS_ALL },
 906   { 0x05, 0xC7, prt_r, "dec %s", INSS_ALL },
 907   { 0x06, 0xC7, ld_r_n, "ld %s,0x%%02x", INSS_ALL },
 908   { 0x07, 0xFF, prt, "rlca", INSS_ALL },
 909   { 0x08, 0xFF, prt_nn, "ld (0x%04x),sp", INSS_GBZ80 },
 910   { 0x09, 0xCF, prt_rr, "add hl,", INSS_ALL },
 911   { 0x0A, 0xFF, prt, "ld a,(bc)", INSS_ALL },
 912   { 0x0B, 0xCF, prt_rr, "dec ", INSS_ALL },
 913   { 0x0F, 0xFF, prt, "rrca", INSS_ALL },
 914   { 0x10, 0xFF, prt, "stop", INSS_GBZ80 },
 915   { 0x12, 0xFF, prt, "ld (de),a", INSS_ALL },
 916   { 0x17, 0xFF, prt, "rla", INSS_ALL },
 917   { 0x18, 0xFF, prt_e, "jr ", INSS_ALL },
 918   { 0x1A, 0xFF, prt, "ld a,(de)", INSS_ALL },
 919   { 0x1F, 0xFF, prt, "rra", INSS_ALL },
 920   { 0x20, 0xE7, jr_cc, "jr %s,", INSS_ALL },
 921   { 0x22, 0xFF, prt, "ld (hl+),a", INSS_GBZ80 },
 922   { 0x27, 0xFF, prt, "daa", INSS_ALL },
 923   { 0x2A, 0xFF, prt, "ld a,(hl+)", INSS_GBZ80 },
 924   { 0x2F, 0xFF, prt, "cpl", INSS_ALL },
 925   { 0x32, 0xFF, prt, "ld (hl-),a", INSS_GBZ80 },
 926   { 0x37, 0xFF, prt, "scf", INSS_ALL },
 927   { 0x3A, 0xFF, prt, "ld a,(hl-)", INSS_GBZ80 },
 928   { 0x3F, 0xFF, prt, "ccf", INSS_ALL },
 929   { 0x76, 0xFF, prt, "halt", INSS_ALL },
 930   { 0x40, 0xC0, ld_r_r, "ld %s,%s", INSS_ALL},
 931   { 0x80, 0xC0, arit_r, "%s%s", INSS_ALL },
 932   { 0xC0, 0xE7, prt_cc, "ret ", INSS_ALL },
 933   { 0xC1, 0xCF, pop_rr, "pop", INSS_ALL },
 934   { 0xC2, 0xE7, jp_cc_nn, "jp ", INSS_ALL },
 935   { 0xC3, 0xFF, prt_nn, "jp 0x%04x", INSS_ALL },
 936   { 0xC4, 0xE7, jp_cc_nn, "call ", INSS_ALL },
 937   { 0xC5, 0xCF, pop_rr, "push", INSS_ALL },
 938   { 0xC6, 0xC7, arit_n, "%s0x%%02x", INSS_ALL },
 939   { 0xC7, 0xC7, rst, "rst 0x%02x", INSS_ALL },
 940   { 0xC9, 0xFF, prt, "ret", INSS_ALL },
 941   { 0xCB, 0xFF, pref_cb, "", INSS_ALL },
 942   { 0xCD, 0xFF, prt_nn, "call 0x%04x", INSS_ALL },
 943   { 0xD9, 0xFF, prt, "reti", INSS_GBZ80 },
 944   { 0xE0, 0xFF, prt_n, "ldh (0x%02x),a", INSS_GBZ80 },
 945   { 0xE2, 0xFF, prt, "ldh (c),a", INSS_GBZ80 },
 946   { 0xE8, 0xFF, prt_d, "add sp,%d", INSS_GBZ80 },
 947   { 0xE9, 0xFF, prt, "jp (hl)", INSS_ALL },
 948   { 0xEA, 0xFF, prt_nn, "ld (0x%04x),a", INSS_GBZ80 },
 949   { 0xF0, 0xFF, prt_n, "ldh a,(0x%02x)", INSS_GBZ80 },
 950   { 0xF2, 0xFF, prt, "ldh a,(c)", INSS_GBZ80 },
 951   { 0xF3, 0xFF, prt, "di", INSS_ALL },
 952   { 0xF8, 0xFF, prt_d, "ldhl sp,%d", INSS_GBZ80 },
 953   { 0xF9, 0xFF, prt, "ld sp,hl", INSS_ALL },
 954   { 0xFA, 0xFF, prt_nn, "ld a,(0x%04x)", INSS_GBZ80 },
 955   { 0xFB, 0xFF, prt, "ei", INSS_ALL },
 956   { 0x00, 0x00, dump, "?", INSS_ALL },
 957 } ;
 958
 959 int
 960 print_insn_z80 (bfd_vma addr, disassemble_info * info)
 961 {
 962   struct buffer buf;
 963
 964   buf.base = addr;
 965   buf.inss = 1 << info->mach;
 966   buf.nn_len = info->mach == bfd_mach_ez80_adl ? 3 : 2;
 967   info->bytes_per_line = (buf.inss & INSS_EZ80) ? 6 : 4; /* <ss pp oo nn mm MM> OR <pp oo nn mm> */
 968
 969   return print_insn_z80_buf (&buf, info);
 970 }
 971
 972 static int
 973 print_insn_z80_buf (struct buffer *buf, disassemble_info *info)
 974 {
 975   const struct tab_elt *p;
 976
 977   buf->n_fetch = 0;
 978   buf->n_used = 0;
 979   if (! fetch_data (buf, info, 1))
 980     return -1;
 981
 982   p = (buf->inss & INSS_GBZ80) ? opc_main_gbz80 : opc_main;
 983
 984   for (; p->val != (buf->data[0] & p->mask) || !mach_inst (buf, p); ++p)
 985     ;
 986   p->fp (buf, info, p->text);
 987
 988   return buf->n_used;
 989 }